Shapes of pored membranes

Zhenwei Yao, Rastko Sknepnek, Creighton K. Thomas, Monica Olvera de la Cruz

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    8 Citations (Scopus)

    Abstract

    We study the shapes of pored membranes within the framework of the Helfrich theory under the constraints of fixed area and pore size. We show that the mean curvature term leads to a budding-like structure, while the Gaussian curvature term tends to flatten the membrane near the pore; this is corroborated by simulation. We propose a scheme to deduce the ratio of the Gaussian rigidity to the bending rigidity simply by observing the shape of the pored membrane. This ratio is usually difficult to measure experimentally. In addition, we briefly discuss the stability of a pore by relaxing the constraint of a fixed pore size and adding the line tension. Finally, the flattening effect due to the Gaussian curvature as found in studying pored membranes is extended to two-component membranes. We find that sufficiently high contrast between the components' Gaussian rigidities leads to budding which is distinct from that due to the line tension.

    Original languageEnglish
    Pages (from-to)11613-11619
    Number of pages7
    JournalSoft Matter
    Volume8
    Issue number46
    Early online date8 Oct 2012
    DOIs
    Publication statusPublished - 2012

    Keywords

    • gaussian curvature modulus
    • elasticity
    • vesicles
    • liposomes

    Cite this

    Yao, Z., Sknepnek, R., Thomas, C. K., & de la Cruz, M. O. (2012). Shapes of pored membranes. Soft Matter, 8(46), 11613-11619. https://doi.org/10.1039/c2sm26608c